JP6853601B2

JP6853601B2 - Telescopic device

Info

Publication number: JP6853601B2
Application number: JP2020157336A
Authority: JP
Inventors: 修江良
Original assignee: Pica Corp
Current assignee: Pica Corp
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-03-31
Anticipated expiration: 2036-05-12
Also published as: JP7109818B2; JP2021001543A; JP2021099026A

Description

本発明は、例えば梯子や脚立の伸縮自在な支柱等の伸縮装置に関するものである。 The present invention relates to an expansion / contraction device such as a ladder or a stepladder that can be expanded and contracted.

例えば脚立の支柱の伸縮装置には、外套体とこの外套体内に伸縮自在に挿入された挿入体とを有する一対の伸縮体が間隔をおいて桟部材で連結され、各外套体には挿入体を伸縮した位置で固定するロック機構と、このロック機構のロックを解除操作するための操作部材とが設けられ、一対の操作部材間に、一対の操作部材を同時に手動操作する操作手段が設けられたものがある。 For example, in the telescopic device of the strut of the stepladder, a pair of telescopic bodies having a mantle body and an insert body stretchably inserted into the mantle body are connected by a crosspiece member at intervals, and the insert body is connected to each mantle body. A lock mechanism for fixing the lock mechanism at an expanded / contracted position and an operating member for unlocking the lock mechanism are provided, and an operating means for manually operating the pair of operating members at the same time is provided between the pair of operating members. There is something.

この種の従来の伸縮装置では、ワイヤー等の伝導体が、ロック機構のロック解除レバー（操作部材）に連結され、そこからチューブの中を通され、天板の裏に収めてあるフレキシブルな操作レバーの中を通され、さらにもう一つのチューブを通されて、対向するもう一つのロック機構の操作部材に、連結されており、一対の操作部材を同時に手動操作する操作手段を、脚立の天板の裏側に納めた操作レバーで構成し、これを使用者が立った姿勢で脚立を持ったまま操作して、一対のロック機構のロック解除を同時に行うようにしたものがある（例えば特許文献１）。 In this type of conventional telescopic device, a conductor such as a wire is connected to an unlocking lever (operating member) of a locking mechanism, passed through a tube from there, and stored in the back of a top plate for flexible operation. An operating means that is connected to the operating member of another locking mechanism that is opposed to the operating member of the locking mechanism, which is passed through the lever and then another tube, and manually operates the pair of operating members at the same time, is a stepping stone. There is one that is composed of an operation lever housed on the back side of the plate and is operated by the user in a standing position while holding the stepper to unlock the pair of lock mechanisms at the same time (for example, Patent Documents). 1).

特開２００５−６１０３３号公報Japanese Unexamined Patent Publication No. 2005-61033

しかし、従来では、一対のロック機構を同時にロック解除して、一対の支柱等の伸縮体を簡単に伸縮調整できるが、一方のロック機構のみをロック解除して、一方の伸縮体を伸縮調整することが困難であり、このため、例えば脚立等の接地場所に傾斜や凹凸がある場合に、一方の伸縮体のみを簡単に伸縮調整することができず、一対の伸縮体を互いに異なる長さに伸縮調整して、傾斜や凹凸がある場所にも安定かつ迅速に設置できるようにすることが困難であった。 However, in the past, a pair of lock mechanisms can be unlocked at the same time to easily expand and contract a pair of stretchable bodies such as columns, but only one lock mechanism can be unlocked and one stretchable body can be stretched and adjusted. Therefore, when there is an inclination or unevenness in the ground contact place such as a stepladder, it is not possible to easily adjust the expansion and contraction of only one of the expansion and contraction bodies, and the pair of expansion and contraction bodies have different lengths from each other. It has been difficult to adjust the expansion and contraction so that it can be installed stably and quickly even in a place with inclination or unevenness.

本発明は上記問題点に鑑み、ロック機構のロック動作及びロック解除動作を、長尺の操作部材を使って上段踏桟部材の近傍で行えるようにした伸縮装置を提供することを目的としている。 In view of the above problems, it is an object of the present invention to provide a telescopic device capable of performing a locking operation and an unlocking operation of a locking mechanism in the vicinity of an upper tread member by using a long operating member.

本発明における課題解決のための具体的手段は、次の通りである。
この技術的課題を解決する本発明の技術的手段は、外套体８とこの外套体８内に伸縮自在に挿入されていて下端が接地可能な挿入体９とを有する左右一対の伸縮体５と、この左右伸縮体５の外套体８の対向面に長手方向両端が対向して連結されている上・中・下３段の踏桟部材６と、各外套体８に挿入されている挿入体９を伸縮した位置で外套体８に対して固定するロック機構７と、各ロック機構７をロック動作及びロック解除動作させる操作部材６９とを備えた伸縮装置であって、
前記操作部材６９は、外套体８の対向面に沿って上下直線移動自在に配置され、かつ外套体８と上段踏桟部材６との連結位置近傍まで延設され、操作部材６９の上部に操作部材６９を上下動させるための力が加えられる上端部が形成されており、
前記上段踏桟部材６の上面より下方でかつ上段踏桟部材６に沿う位置に、操作部材６９の上端部に上下動させるための力を付与する操作杆９６が配置されており、
前記操作杆９６の端部に連動部９５が設けられ、この連動部９５と係合して操作杆９６の動作を操作部材６９の上下動に変換する係合部９４が操作部材６９の上端部に設けられている点にある。 Specific means for solving the problem in the present invention are as follows.
The technical means of the present invention for solving this technical problem is a pair of left and right telescopic bodies 5 having a mantle 8 and an inserter 9 which is stretchably inserted into the mantle 8 and whose lower end can be grounded. , The upper, middle, and lower three-stage tread members 6 in which both ends in the longitudinal direction are connected to the facing surfaces of the outer body 8 of the left and right telescopic body 5 so as to face each other, and the insert body inserted into each outer body 8. A telescopic device including a lock mechanism 7 for fixing the 9 to the mantle 8 at a telescopic position, and an operating member 69 for locking and unlocking each lock mechanism 7.
The operation member 69 is arranged so as to be linearly movable up and down along the facing surface of the mantle body 8 and extends to the vicinity of the connecting position between the mantle body 8 and the upper tread member 6 and is operated on the upper part of the manure body 69. An upper end portion to which a force for moving the member 69 up and down is applied is formed.
An operation stick 96 for applying a force for vertically moving the upper end portion of the operation member 69 is arranged below the upper surface of the upper step member 6 and along the upper step member 6.
An interlocking portion 95 is provided at the end of the operating rod 96, and the engaging portion 94 that engages with the interlocking portion 95 to convert the operation of the operating rod 96 into the vertical movement of the operating member 69 is the upper end portion of the operating member 69. It is in the point provided in.

また、本発明の他の技術的手段は、前記上段踏桟部材６は上面より下側で下方に開放された凹溝１９を有しており、この凹溝１９に前記操作杆９６が動作可能に配置されている点にある。
また、本発明の他の技術的手段は、前記係合部９４は、操作部材６９とは別体に構成して固定された係合体９８によって形成されている点にある。 Further, in another technical means of the present invention, the upper tread member 6 has a concave groove 19 which is open downward below the upper surface, and the operation stick 96 can operate in the concave groove 19. It is located at the point.
Further, another technical means of the present invention is that the engaging portion 94 is formed by an engaging body 98 which is formed and fixed separately from the operating member 69.

また、本発明の他の技術的手段は、前記外套体８は断面視略コの字状であって外套体８が向き合う対向部側には長手方向に開口溝１０が形成されており、
前記操作部材６９は外套体８の対向面側に開口溝１０を塞いで配置されている点にある。
また、本発明の他の技術的手段は、前記操作部材６９の下部とロック部材２３との間でかつ開口溝１０と対面する位置に、操作部材６９の上下移動でロック部材２３を係脱動作させる連結体８２が設けられている点にある。 Further, in another technical means of the present invention, the mantle 8 has a substantially U-shape in cross section, and an opening groove 10 is formed in the longitudinal direction on the facing portion side where the mantle 8 faces.
The operating member 69 is arranged so as to close the opening groove 10 on the facing surface side of the mantle body 8.
In addition, another technical means of the present invention engages and disengages the lock member 23 by moving the operating member 69 up and down at a position between the lower portion of the operating member 69 and the lock member 23 and facing the opening groove 10. The point is that the connecting body 82 is provided.

また、本発明の他の技術的手段は、前記操作部材６９は、開口溝１０を塞ぐべく上下方向に長い板状の操作壁部６９ａと、操作壁部６９ａの前後両端部から外側方に突出した前後一対の側壁部６９ｂとを有している点にある。
また、本発明の他の技術的手段は、前記各ロック機構７は、挿入体９に長手方向に沿って設けられかつ開口溝１０に対向する被係止部１１と、外套体８と下段踏桟部材６との連結位置近傍に配置されかつ開口溝１０内に挿脱して挿入体９の被係止部１１と係脱自在に係合するロック部材２３と、ロック部材２３を揺動自在に支持する枢支軸２４と、ロック部材２３をロック動作させる方向に付勢するバネ９０と、このバネ９０に抗してロック部材２３を枢支軸２４廻りに揺動させるハンドル２５と、外套体８の対向面に固定されていて枢支軸２４を支持する支持フレーム１８とを有している点にある。 Further, in another technical means of the present invention, the operating member 69 has a plate-shaped operating wall portion 69a that is long in the vertical direction so as to close the opening groove 10, and projects outward from both front and rear ends of the operating wall portion 69a. It is at the point that it has a pair of front and rear side wall portions 69b.
Further, in another technical means of the present invention, each of the locking mechanisms 7 is provided in the insertion body 9 along the longitudinal direction, and the locked portion 11 facing the opening groove 10, the outer body 8 and the lower step. The lock member 23, which is arranged near the connection position with the crosspiece member 6 and is inserted into and detached from the opening groove 10 to engage with the locked portion 11 of the insert body 9 so as to be engaged and disengaged, and the lock member 23 can swing freely. A support shaft 24, a spring 90 that urges the lock member 23 in a locking operation, a handle 25 that swings the lock member 23 around the pivot shaft 24 against the spring 90, and an outer body. 8 is fixed to the facing surface and has a support frame 18 for supporting the pivot shaft 24.

また、本発明の他の技術的手段は、前記挿入体９の上端には、前記ロック機構７と当接して外套体８からの抜けを規制する抜け止め部材１５が開口溝１０から外方突出状に設けられている点にある。 Further, in another technical means of the present invention, at the upper end of the insertion body 9, a retaining member 15 that comes into contact with the locking mechanism 7 and regulates the removal from the mantle 8 protrudes outward from the opening groove 10. It is in the point that it is provided in a shape.

本発明によれば、ロック機構をロック動作及びロック解除動作させるための操作部材を、上段踏桟部材近傍の操作杆で上下動させることができる。
また、本発明によれば、上段踏桟部材６に手を掛けながら操作部材６９の移動操作をすることができる。 According to the present invention, the operating member for locking and unlocking the locking mechanism can be moved up and down by the operating rod near the upper tread member.
Further, according to the present invention, Ru can be a moving operation of the operating member 69 while applying a hand on the upper踏桟member 6.

また、本発明によれば、操作部材６９で外套体８の対向面側の開口溝１０を塞ぐことができる。
また、本発明によれば、連結体８２で外套体８の対向面側の開口溝１０を塞ぐことがきる。 Further, according to the present invention, the operating member 69 can close the opening groove 10 on the facing surface side of the mantle body 8.
Further, according to the present invention, Ru Kotogaki for closing the opening groove 10 of the facing side of the overcoat member 8 by the connecting member 82.

また、本発明によれば、外套体８の対向面側の開口溝１０を利用して、ロック部材２３を挿入体９の被係止部１１と係脱させることができる。
また、本発明によれば、外套体８の対向面側の開口溝１０を利用して、抜け止め部材１５をロック機構７と当接させることができる。 Further, according to the present invention, the lock member 23 can be engaged with and disengaged from the locked portion 11 of the insertion body 9 by utilizing the opening groove 10 on the facing surface side of the mantle body 8.
Further, according to the present invention, the retaining member 15 can be brought into contact with the lock mechanism 7 by utilizing the opening groove 10 on the facing surface side of the mantle body 8.

本発明の第１実施形態を示す脚立の一部断面正面図である。It is a partial cross-sectional front view of the stepladder which shows the 1st Embodiment of this invention. 同支柱の斜視図である。It is a perspective view of the support. 同支柱の内側から見た側面図である。It is a side view seen from the inside of the support. 同支柱下部の正面断面図である。It is a front sectional view of the lower part of the support. 同ロックを解除した状態の支柱下部の正面断面図である。It is a front sectional view of the lower part of the column with the lock released. 同支柱上部の正面断面図である。It is a front sectional view of the upper part of the support. 図４のＡ−Ａ線断面図である。FIG. 4 is a cross-sectional view taken along the line AA of FIG. 図６のＢ−Ｂ線断面図である。FIG. 6 is a sectional view taken along line BB of FIG. ロック部材及びハンドル等の分解斜視図である。It is an exploded perspective view of a lock member, a handle and the like. 下ガイド部材、連結体、連動具等の分解斜視図である。It is an exploded perspective view of a lower guide member, a connecting body, an interlocking tool and the like. 同支柱上部の斜視図である。It is a perspective view of the upper part of the support. 脚立の全体側面図である。It is an overall side view of a stepladder. 本発明の第２実施形態を示す踏台の全体斜視図である。It is an overall perspective view of the stepping stone which shows the 2nd Embodiment of this invention. 同支柱上部の斜視図である。It is a perspective view of the upper part of the support. 本発明の第３実施形態を示す支柱上部の斜視図である。It is a perspective view of the upper part of the column which shows the 3rd Embodiment of this invention.

以下、本発明の実施形態を図面に基づいて説明する。
図１〜図１２は本発明の伸縮装置を脚立に実施した第１実施形態を示している。図１及び図１２において、脚立１は、対向配置された一対の梯子２の上部を互いにブラケット３を介してピン４により枢支することにより主構成されている。この脚立１は一対の梯子２を接地面に立てかけることで使用できると共に、一対の梯子２を開かないように両梯子２をロックしている開き止め具のロックを解除して一方の梯子２をピン４廻りに回動させることで使用することができるものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 12 show a first embodiment in which the telescopic device of the present invention is mounted on a stepladder. In FIGS. 1 and 12, the stepladder 1 is mainly configured by pivotally supporting the upper portions of a pair of ladders 2 arranged so as to face each other with a pin 4 via a bracket 3. This stepladder 1 can be used by leaning a pair of ladders 2 against a ground plane, and unlocks the opening stoppers that lock both ladders 2 so as not to open the pair of ladders 2. It can be used by rotating it around the pin 4.

梯子２は、左右に間隔をおいて配置されて伸縮自在な一対の支柱５（伸縮体）と、この左右支柱５をそれぞれ連結する複数の踏桟部材（桟部材）６と、支柱５と踏桟部材６との間に設けられたロック機構７を有している。
なお、以下の説明において、説明の便宜上、図１に示すように、踏桟部材６を正面視できて、支柱５が並列している方向（図１の紙面左右方向）を左右方向とし、図１１に示すように梯子２の並列方向（図１１の紙面左右方向）を前後方向とする。 The ladder 2 has a pair of struts 5 (expandable bodies) that are arranged at intervals on the left and right and can be expanded and contracted, a plurality of tread members (bar members) 6 that connect the left and right stanchions 5, and the stanchions 5 and treads. It has a lock mechanism 7 provided between the crosspiece member 6 and the crosspiece member 6.
In the following description, for convenience of explanation, as shown in FIG. 1, the step ladder member 6 can be viewed from the front, and the direction in which the columns 5 are arranged in parallel (the left-right direction on the paper surface in FIG. 1) is defined as the left-right direction. As shown in 11, the parallel direction of the ladder 2 (the left-right direction on the paper surface of FIG. 11) is the front-back direction.

各支柱５は、チャンネル材で形成された支柱本体８（外套体）と、この支柱本体８内に挿入された角筒状の脚柱９（挿入体）とを有しており、脚柱９を軸心方向（上下方向）にスライドすることによって支柱５は伸縮自在となっていて、脚柱９はロック機構７によって伸縮した所定の位置で軸心方向移動不能に固定されるようになっている。
図１〜１０において、支柱本体８はアルミニウム等の金属系で断面視略コの字状に形成され、この支柱本体８が向き合っている支柱本体８の対向部側には長手方向に開口溝１０が形成されている。 Each column 5 has a column body 8 (mantle body) formed of a channel material and a square tubular pedestal 9 (insertion body) inserted into the column body 8. The column 5 is expandable and contractible by sliding in the axial direction (vertical direction), and the pedestal 9 is fixed by the lock mechanism 7 so as not to be movable in the axial direction at a predetermined position expanded and contracted. There is.
In FIGS. 1 to 10, the support column body 8 is formed of a metal system such as aluminum in a substantially U-shape in cross section, and an opening groove 10 is formed in the longitudinal direction on the facing portion side of the support column body 8 facing the support column body 8. Is formed.

脚柱９は支柱本体８と同様にアルミニウム等の金属系で形成されており、支柱本体８の対向側の開口溝１０に対応する位置の側壁には複数の被係止部１１（ラック部）が形成されている。脚柱９の下端部には接地部材１２が装着され、この接地部材１２により梯子２が安定した状態で接地面に接地するようになっている。脚柱９の挿入基部である上部に、後述するロック機構７の支持フレーム１８に当接して脚柱９を支柱本体８から抜け止めする抜け止め部材１５が開口溝１０から外方突出状に設けられている。 The pedestal 9 is formed of a metal material such as aluminum like the column main body 8, and a plurality of locked portions 11 (rack portions) are mounted on the side wall at a position corresponding to the opening groove 10 on the opposite side of the column main body 8. Is formed. A grounding member 12 is attached to the lower end of the pedestal 9, and the grounding member 12 allows the ladder 2 to come into contact with the grounding surface in a stable state. A retaining member 15 is provided on the upper portion of the insertion base of the pedestal 9 so as to protrude outward from the opening groove 10 so as to abut the support frame 18 of the lock mechanism 7 described later and prevent the pedestal 9 from coming off from the main body 8. Has been done.

なお、抜け止め部材１５は、図６に示すようにボルト等の固定具１７で脚柱９に着脱自在に固定されている。
梯子２の踏桟部材６のうちの、最下段の踏桟部材６（６ａ）と中間部の踏桟部材６（６ｂ）は、角筒状に形成されて、これら踏桟部材６の上下面は前側から後側にいくにしたがって上方又は下方に移行するように傾斜しており、上面側の傾斜部１６に滑り止め用の凸凹がその長手方向に亘って形成されている。 As shown in FIG. 6, the retaining member 15 is detachably fixed to the pedestal 9 with a fixing tool 17 such as a bolt.
Of the stepping members 6 of the ladder 2, the lowermost stepping member 6 (6a) and the intermediate stepping member 6 (6b) are formed in a square tubular shape, and the upper and lower surfaces of these stepping members 6 are formed. Is inclined so as to move upward or downward from the front side to the rear side, and unevenness for slip prevention is formed on the inclined portion 16 on the upper surface side over the longitudinal direction thereof.

梯子２の中間部の踏桟部材６（６ｂ）は、支柱本体８の前後壁１３Ｆ，１３Ｒに装着された板状のブラケット１４を介して左右の支柱本体８間で固定されている。
板状のブラケット１４は踏桟部材６の外端部に対応して前後一対ずつ配置されており、各ブラケット１４は、支柱固定部１４ａと踏桟固定部１４ｂとを段部１４ｃを介して有し、支柱固定部１４ａは支柱本体８にリベット等の固定具２２で固定され、踏桟固定部１４ｂは踏桟部材６の外端部にリベット等の固定具２２で固定され、図８に示すように支柱本体８の外側面と踏桟部材６の端部との間に後述する操作部材６９の挿通空間２１が形成されている。 The tread member 6 (6b) at the intermediate portion of the ladder 2 is fixed between the left and right strut bodies 8 via plate-shaped brackets 14 mounted on the front and rear walls 13F and 13R of the strut body 8.
A pair of front and rear brackets 14 are arranged so as to correspond to the outer end portion of the tread member 6, and each bracket 14 has a strut fixing portion 14a and a tread fixing portion 14b via a step portion 14c. The strut fixing portion 14a is fixed to the strut body 8 with a fixing tool 22 such as a rivet, and the tread fixing portion 14b is fixed to the outer end portion of the tread member 6 with a fixing tool 22 such as a rivet, and is shown in FIG. As described above, an insertion space 21 for the operation member 69, which will be described later, is formed between the outer surface of the support column main body 8 and the end portion of the tread member 6.

梯子２の踏桟部材６のうちの、最上段の踏桟部材６（６ｃ）は、下向きに開口した凹溝１９を有する側断面コの状に形成されている。
ロック機構７は、梯子２の最下段の踏桟部材６ａと支柱５との間にそれぞれ設けられて、１つの支柱５につき１つのロック機構７が設けられ、左右支柱本体８のそれぞれの対向面にロック機構７が装着されている。 Of the stepping members 6 of the ladder 2, the uppermost stepping member 6 (6c) is formed in the shape of a side cross section having a concave groove 19 that opens downward.
The lock mechanism 7 is provided between the tread member 6a at the lowermost stage of the ladder 2 and the support column 5, and one lock mechanism 7 is provided for each support column 5, and the opposite surfaces of the left and right support column main bodies 8 are provided. The lock mechanism 7 is attached to the ladder.

このロック機構７は、支柱本体８に固定の支持フレーム１８と、支持フレーム１８に対して左右方向（図４及び図５のａ方向）に揺動自在に枢支されていて脚柱９の被係止部１１と係合するロック部材２３と、ロック部材２３を揺動自在に支持する枢支軸２４と、枢支軸２４に支持されてロック部材２３を脚柱９から離脱揺動させる（ロック部材２３を離脱操作する）ハンドル２５と、を有している。 The lock mechanism 7 is pivotally supported by a support frame 18 fixed to the column main body 8 and swingably in the left-right direction (direction a in FIGS. 4 and 5) with respect to the support frame 18, and is covered by the pedestal 9. The lock member 23 that engages with the locking portion 11, the pivot shaft 24 that swingably supports the lock member 23, and the lock member 23 that is supported by the pivot shaft 24 and swings apart from the pedestal 9 ( It has a handle 25 (which operates the lock member 23 to be released).

ロック部材２３は、後述するように支持フレーム１８に支持された枢支軸２４を中心として左右方向に揺動自在となっており、ロック部材２３の揺動により脚柱９への係脱が自在に行えるようになっている。
また、ロック機構７は、支持フレーム１８に図２、図４及び図５に示すロック位置Ｘとロック解除位置Ｙとに移動自在に支持された連動具２７を有し、ロック部材２３と連動具２７との間に、連動具２７がロック位置Ｘに移動するときにロック部材２３を脚柱９と係合させかつ連動具２７がロック解除位置Ｙに移動するときにロック部材２３を脚柱９から離脱させる連動手段２９と、連動具２７がロック位置Ｘに移動したときにロック部材２３の離脱揺動を阻止しかつ連動具２７がロック位置Ｘから外れたときにロック部材２３の離脱揺動を許容する離脱阻止手段３０と、が設けられている。 As will be described later, the lock member 23 is swingable in the left-right direction about the pivot shaft 24 supported by the support frame 18, and can be freely engaged with and disengaged from the pedestal 9 by swinging the lock member 23. You can do it.
Further, the lock mechanism 7 has an interlocking tool 27 movably supported on the support frame 18 at the lock position X and the unlock position Y shown in FIGS. 2, 4 and 5, and the lock member 23 and the interlocking tool. The lock member 23 is engaged with the pedestal 9 when the interlocking tool 27 moves to the lock position X, and the lock member 23 is engaged with the pedestal 9 when the interlocking tool 27 moves to the unlocking position Y. When the interlocking means 29 and the interlocking tool 27 move to the lock position X, the locking member 23 is prevented from swinging apart, and when the interlocking tool 27 is disengaged from the lock position X, the locking member 23 is disengaged and swung. Withdrawal preventing means 30 is provided.

支持フレーム１８は、アルミニウム等の金属系の１枚の板材を屈曲させて箱状に形成され且つ、支柱本体８及び踏桟部材６に装着可能とされたもので、脚柱９側（支柱５側）は開口状となっていて、支柱本体８の前後壁１３Ｆ，１３Ｒに装着され且つ、対向部側に延設された一対の前後側壁部３２Ｆ，３２Ｒと、脚柱９の被係止部１１に対向し且つ、前後側壁部３２Ｆ，３２Ｒの間に配置された背壁部３３と、前後側壁部３２Ｆ，３２Ｒの下部から下方に突出していて踏桟部材６に装着される一対の踏桟装着部３４Ｆ，３４Ｒとを有している。 The support frame 18 is formed in a box shape by bending a single metal-based plate material such as aluminum, and can be attached to the column main body 8 and the tread member 6, and is mounted on the pedestal 9 side (column 5). The side) is open, and a pair of front and rear side wall portions 32F and 32R mounted on the front and rear walls 13F and 13R of the column main body 8 and extended to the facing portion side, and a locked portion of the pedestal 9 A pair of treads that face the 11 and are arranged between the front and rear side wall portions 32F and 32R, and a pair of treads that protrude downward from the lower part of the front and rear side wall portions 32F and 32R and are attached to the tread member 6. It has mounting portions 34F and 34R.

支持フレーム１８の前後側壁部３２Ｆ，３２Ｒの外側部は、支柱本体８の前後壁１３Ｆ，１３Ｒを挟み込み可能に形成されており、前後側壁部３２Ｆ，３２Ｒの外側部で支柱本体８の前後壁１３Ｆ，１３Ｒを挟み込み、リベット等の固定具２２をこれらに打ち付けることによって、支持フレーム１８は支柱本体８に装着されている。
支持フレーム１８の踏桟装着部３４Ｆ，３４Ｒは、踏桟部材６の前後壁２６Ｆ，２６Ｒの端部側を挟み込み可能に形成されており、踏桟装着部３４Ｆ，３４Ｒで踏桟部材６の前後壁２６Ｆ，２６Ｒの端部側を挟み込み、リベット等の固定具２２をこれらに打ち付けることによって支持フレーム１８は踏桟部材６に装着されている。 The outer portions of the front and rear side wall portions 32F and 32R of the support frame 18 are formed so that the front and rear walls 13F and 13R of the support column main body 8 can be sandwiched, and the front and rear wall 13F of the support column main body 8 is formed by the outer portions of the front and rear side wall portions 32F and 32R. , 13R is sandwiched and a fixture 22 such as a rivet is struck against them, so that the support frame 18 is attached to the support column main body 8.
The rivet mounting portions 34F and 34R of the support frame 18 are formed so as to be able to sandwich the end sides of the front and rear walls 26F and 26R of the rivet member 6, and the rivet mounting portions 34F and 34R are formed in front of and behind the rivet member 6. The support frame 18 is attached to the tread member 6 by sandwiching the end sides of the walls 26F and 26R and striking fixtures 22 such as rivets against them.

したがって、支持フレーム１８は踏桟部材６を支柱５に連結するためのブラケットの機能を有しており、これにより、踏桟部材６を支柱５に装着するためのブラケットの数を少なくすることができる。
支持フレーム１８を踏桟部材６に装着したとき、踏桟部材６の上面側の傾斜部１６は支持フレーム１８内に突入している。支持フレーム１８の背壁部３３は、前後方向の垂直板状に形成されている。 Therefore, the support frame 18 has a function of a bracket for connecting the tread member 6 to the support column 5, thereby reducing the number of brackets for attaching the treadle member 6 to the support column 5. it can.
When the support frame 18 is attached to the tread member 6, the inclined portion 16 on the upper surface side of the tread member 6 plunges into the support frame 18. The back wall portion 33 of the support frame 18 is formed in the shape of a vertical plate in the front-rear direction.

枢支軸２４は円柱状に形成され、支持フレーム１８の前後側壁部３２Ｆ，３２Ｒに貫通状に設けられてロック部材２３の揺動方向と同一方向に回転自在に支持されている。
枢支軸２４の先端部には、後側壁部３２Ｒの枢支軸用貫通孔３６Ｒ（枢支軸用貫通孔３６Ｆ，３６Ｒの一方）よりも大きな径の抜止リング３７が装着されており、枢支軸２４を前方に引いたときにその抜止リング３７が後側壁部３２Ｒに当接してストッパとなり枢支軸２４は枢支軸用貫通孔３６Ｒから抜け落ちないようになっている。 The pivot shaft 24 is formed in a columnar shape, is provided through the front and rear side wall portions 32F and 32R of the support frame 18, and is rotatably supported in the same direction as the swing direction of the lock member 23.
At the tip of the pivot shaft 24, a retaining ring 37 having a diameter larger than that of the pivot shaft through hole 36R (one of the pivot shaft through holes 36F and 36R) of the rear side wall portion 32R is mounted. When the support shaft 24 is pulled forward, the retaining ring 37 abuts on the rear side wall portion 32R to serve as a stopper so that the pivot shaft 24 does not fall out of the through hole 36R for the pivot shaft.

図３，図４，図５，図９に示すように、ハンドル２５は、把持部４１と、把持部４１から連動具２７側に突出した作動部４２とを備え、把持部４１は枢支軸２４の一端部（前端部）に溶接等により固着され、前側壁部３２Ｆの外面に沿って配置され、枢支軸２４と作動部４２との前部側を連結している。作動部４２は円柱状に形成され、枢支軸２４とは径方向に離れた位置で後方向に突出している。枢支軸２４と把持部４１と作動部４２とで側面視略コの字形に形成されている。 As shown in FIGS. 3, 4, 5, and 9, the handle 25 includes a grip portion 41 and an actuating portion 42 protruding from the grip portion 41 toward the interlocking tool 27, and the grip portion 41 is a pivot shaft. It is fixed to one end (front end) of 24 by welding or the like, is arranged along the outer surface of the front side wall 32F, and connects the front side of the pivot shaft 24 and the operating portion 42. The operating portion 42 is formed in a columnar shape, and protrudes in the rear direction at a position radially separated from the pivot shaft 24. The pivot shaft 24, the grip portion 41, and the actuating portion 42 are formed in a substantially U-shape in side view.

ハンドル２５の作動部４２は、支持フレーム１８の前壁部３２Ｆの下部に設けられた作動部用貫通孔４４に挿通されている。作動部用貫通孔４４は、枢支軸２４の軸心を中心（
枢支軸用貫通孔３６Ｆ，３６Ｒの中心）とする円弧形状に形成されている。
ハンドル２５の把持部４１は、枢支軸２４及び作動部４２を一体的に連結している。把持部４１と枢支軸２４の前部と作動部４２の前部に合成樹脂製のハンドルカバー４７が外嵌装着され、ハンドルカバー４７は把持部４１と枢支軸２４の前部と作動部４２の前部との外周を覆っている。ハンドルカバー４７の下部に左右小幅のつまみ４８が下方に突設されている。 The actuating portion 42 of the handle 25 is inserted through the actuating portion through hole 44 provided in the lower part of the front wall portion 32F of the support frame 18. The through hole 44 for the operating portion is centered on the axis of the pivot shaft 24 (
It is formed in an arc shape as the center of the through holes 36F and 36R for the pivot shaft).
The grip portion 41 of the handle 25 integrally connects the pivot shaft 24 and the actuating portion 42. A synthetic resin handle cover 47 is externally fitted to the front portion of the grip portion 41 and the pivot shaft 24 and the front portion of the actuating portion 42, and the handle cover 47 is mounted on the front portion of the grip portion 41 and the pivot shaft 24 and the actuating portion. It covers the outer circumference of 42 with the front part. Left and right narrow knobs 48 are projected downward from the lower part of the handle cover 47.

ロック部材２３は、支持フレーム１８の前後壁部３２Ｆ，３２Ｒ間に配置され、枢支軸２４の前後略中央部に装着される枢支軸用装着部４９と、作動部４２の外側方に配置される揺動突部５１と、脚柱９の被係止部１１に係合する係止部５２とを有している。
ロック部材２３の枢支軸用装着部４９は枢支軸２４に回動自在に外嵌されており、ロック部材２３は枢支軸２４廻りに左右方向（ａ方向）に揺動自在に支持されている。ロック部材２３の下部（遊端側）に連動具２７に向けて押圧部５４が突設され、枢支軸用装着部４９に操作片５５が内側方に突設されている。 The lock member 23 is arranged between the front and rear wall portions 32F and 32R of the support frame 18, and is arranged outside the pivot shaft mounting portion 49 mounted on the front and rear substantially central portion of the pivot shaft 24 and the operating portion 42. It has a swinging protrusion 51 and a locking portion 52 that engages with the locked portion 11 of the pedestal 9.
The pivot shaft mounting portion 49 of the lock member 23 is rotatably fitted to the pivot shaft 24, and the lock member 23 is swingably supported around the pivot shaft 24 in the left-right direction (a direction). ing. A pressing portion 54 is projected toward the interlocking tool 27 at the lower portion (free end side) of the lock member 23, and an operation piece 55 is projected inward at the pivot shaft mounting portion 49.

図４，図５，図１０に示すように、前記連動具２７は、前後一対の側壁２７ａと前後側壁２７ａの上部を連結する上壁２７ｂと前後側壁２７ａの左右方向内端部を連結する背壁２７ｃとを有する外側方が開口した箱形に形成され、支持フレーム１８内のロック部材２３の左右方向の内方側に上方突出状に配置され、支持フレーム１８の背壁部３３の内面に沿って上下摺動（移動）自在に保持されている。従って、左右支持フレーム１８の連動具２７は左右の支柱本体８の対向面に沿ってそれぞれその長手方向に移動自在に保持されている。 As shown in FIGS. 4, 5, and 10, the interlocking tool 27 has a back that connects an upper wall 27b that connects a pair of front and rear side walls 27a and the upper part of the front and rear side walls 27a and an inner end portion of the front and rear side walls 27a in the left-right direction. It is formed in a box shape having an opening on the outside side having a wall 27c, and is arranged so as to project upward in the lateral direction of the lock member 23 in the support frame 18, and is formed on the inner surface of the back wall portion 33 of the support frame 18. It is held so that it can slide (move) up and down along it. Therefore, the interlocking tool 27 of the left and right support frames 18 is held so as to be movable in the longitudinal direction along the facing surfaces of the left and right column main bodies 8.

連動具２７の背壁２７ｃの上部に角筒体５７が外側方に突設されおり、角筒体５７の上部が第１押動片５８とされ、下部が第２押動片５９とされ、第１押動片５８と第２押動片５９とは操作片５５の先端部を上下に挟んだ状態で上下に離間している。背壁２７ｃの角筒体５７の下方に規制部６０が外側方に突設され、規制部６０の前後両側に円弧状のカム面６１ａを有する前後一対のカム壁６１が設けられている。 A square cylinder 57 is projected outward from the upper part of the back wall 27c of the interlocking tool 27, the upper part of the square cylinder 57 is the first push piece 58, and the lower part is the second push piece 59. The first pushing piece 58 and the second pushing piece 59 are vertically separated from each other with the tip of the operating piece 55 sandwiched vertically. A regulating portion 60 is projected outward below the square cylinder 57 of the back wall 27c, and a pair of front and rear cam walls 61 having arc-shaped cam surfaces 61a are provided on both front and rear sides of the regulating portion 60.

連動具２７の上壁２７ｂに前後一対の連結片６２が上方突設され、各連結片６２には取付孔６３が設けられている。
而して、前記連動手段２９は、ロック部材２３に突設した操作片５５と、連動具２７に突設した第１押動片５８及び第２押動片５９とを備え、第１押動片５８及と第２押動片５９とは操作片５５を連動具２７の移動方向に挟んでおり、連動具２７がロック位置Ｘに移動するときにロック部材２３を係合方向に揺動させるべく第１押動片５８が操作片５５を押動し、連動具２７がロック解除位置Ｙに移動するときにロック部材２３を離脱方向に揺動させるべく第２押動片５９が操作片５５を押動するように構成されている。 A pair of front and rear connecting pieces 62 are projected upward from the upper wall 27b of the interlocking tool 27, and each connecting piece 62 is provided with a mounting hole 63.
Thus, the interlocking means 29 includes an operation piece 55 projecting from the lock member 23, and a first pushing piece 58 and a second pushing piece 59 projecting from the interlocking tool 27, and the first pushing force 29. The piece 58 and the second pushing piece 59 sandwich the operation piece 55 in the moving direction of the interlocking tool 27, and swing the lock member 23 in the engaging direction when the interlocking tool 27 moves to the lock position X. The first push piece 58 pushes the operation piece 55, and when the interlocking tool 27 moves to the unlock position Y, the second push piece 59 swings the lock member 23 in the release direction. Is configured to push.

なお、本実施形態の場合、連動具２７がロック解除位置Ｙからロック位置Ｘに移動するとき、まず、規制部６０が押圧部５４を下方に押動して、ロック部材２３を係合方向に揺動させ、その後に、第１押動片５８が操作片５５を下方に押動するようになり、連動具２７がロック位置Ｘに移動したときに、ロック部材２３の係合方向への揺動が完了するようになっている。 In the case of the present embodiment, when the interlocking tool 27 moves from the unlocking position Y to the locking position X, the regulating unit 60 first pushes the pressing unit 54 downward to move the locking member 23 in the engaging direction. After swinging, the first pushing piece 58 pushes the operating piece 55 downward, and when the interlocking tool 27 moves to the lock position X, the locking member 23 swings in the engaging direction. The movement is to be completed.

また、前記離脱阻止手段３０は、ロック部材２３の揺動端部側に連動具２７に向けて突設した押圧部５４と、連動具２７に押圧部５４に向けて突設した規制部６０とを備え、連動具２７がロック位置Ｘに移動したときに、押圧部５４と規制部６０とが対向して、ロック部材２３の離脱揺動を阻止し、連動具２７がロック位置Ｘから外れたときに規制部６０が押圧部５４対向位置から外れて、ロック部材２３の離脱揺動を許容するように構成されている。 Further, the detachment preventing means 30 includes a pressing portion 54 projecting toward the interlocking tool 27 on the swinging end side of the lock member 23, and a regulating portion 60 projecting toward the pressing portion 54 on the interlocking tool 27. When the interlocking tool 27 moves to the lock position X, the pressing portion 54 and the restricting portion 60 face each other to prevent the lock member 23 from swinging apart, and the interlocking tool 27 is disengaged from the lock position X. Occasionally, the restricting portion 60 is configured to deviate from the position facing the pressing portion 54 to allow the lock member 23 to swing apart.

また、連動具２７がロック位置Ｘからロック解除位置Ｙに移動するときに、規制部６０が押圧部５４に対して外れた後にロック部材２３の離脱揺動が開始されるように、図４に示す如く第２押動片５９と操作片５５との間にアイドル間隙６５が形成されている。
ハンドル２５を枢支軸２４廻りに矢印ａ方向の左右内方に回動操作することにより、連動具２７を後述の付勢部材９１の付勢に抗してロック解除位置Ｙに押動する連動具押動手段６７が把持部４１と連動具２７との間に設けられている。この連動具押動手段６７は、
作動部４２の外周面と連動具２７の前後カム壁６１のカム面６１ａとで構成されている。 Further, in FIG. 4, when the interlocking tool 27 moves from the lock position X to the lock release position Y, the locking member 23 starts to swing apart after the restricting portion 60 is released from the pressing portion 54. As shown, an idle gap 65 is formed between the second pushing piece 59 and the operating piece 55.
By rotating the handle 25 around the pivot shaft 24 inward to the left and right in the direction of the arrow a, the interlocking tool 27 is pushed to the unlocked position Y against the urging of the urging member 91 described later. The tool pushing means 67 is provided between the grip portion 41 and the interlocking tool 27. The interlocking tool pushing means 67 is
It is composed of an outer peripheral surface of the operating portion 42 and a cam surface 61a of the front and rear cam walls 61 of the interlocking tool 27.

図２，図３，図６，図８，図１０に示すように、ロック部材２３を操作するための操作部材６９が左右支柱本体８の対向面（外面）に開口溝１０を塞ぐように上下方向に配置されている。この操作部材６９は上下方向に長尺に形成されており、支柱本体８の対向面（外面）に沿って長手方向に移動自在に保持されると共に、前記挿通空間２１に上下移動自在に挿通保持されている。操作部材６９の下端部（一端部）に後述の連結体８２を介して連動具２７が連結され、これにより、操作部材６９はロック部材２３に連動されている。操作部材６９の上部が最上段の踏桟部材６ｃの下側近傍に達している。 As shown in FIGS. 2, 3, 6, 8, and 10, the operating member 69 for operating the lock member 23 moves up and down so as to close the opening groove 10 on the facing surface (outer surface) of the left and right column main bodies 8. Arranged in the direction. The operating member 69 is formed to be elongated in the vertical direction, and is movably held in the longitudinal direction along the facing surface (outer surface) of the support column main body 8, and is vertically movable and held in the insertion space 21. Has been done. The interlocking tool 27 is connected to the lower end (one end) of the operating member 69 via a connecting body 82 described later, whereby the operating member 69 is interlocked with the lock member 23. The upper part of the operating member 69 reaches the vicinity of the lower side of the uppermost tread member 6c.

操作部材６９は、上下方向に長い板状の操作壁部６９ａと、操作壁部６９ａの前後両端部から外側方に突出した前後一対の側壁部６９ｂとを有し、操作壁部６９ａの下部に上係止孔７１と下係止孔７２とが上下に間隔をおいて設けられ、これら係止孔７１，７２は前後に長い長方形状に形成されている。
支柱本体８に、前記操作部材６９を移動自在に案内する上ガイド部材７６と下ガイド部材７７とが設けられている。 The operation member 69 has a plate-shaped operation wall portion 69a that is long in the vertical direction and a pair of front and rear side wall portions 69b that protrude outward from both front and rear ends of the operation wall portion 69a, and is located below the operation wall portion 69a. The upper locking hole 71 and the lower locking hole 72 are provided at a vertical interval, and these locking holes 71 and 72 are formed in a long rectangular shape in the front-rear direction.
The column main body 8 is provided with an upper guide member 76 and a lower guide member 77 that movably guide the operation member 69.

図２，図３，図６及び図１１に示すように、上ガイド部材７６は、前後一対の側壁７６ａと、前後側壁７６ａの上部に左右内方に延設された前後一対の取付壁７６ｂと、前後取付壁７６ｂの上部に連結された水平板状の上連結壁７６ｃと、前後側壁７６ａの下部に連結された垂直板状の下連結壁７６ｄとを有し、前後側壁７６ａがリベット等の固定具２２を打ち付けることによって支柱本体８の前後側壁１３Ｆ，１３Ｒに固着されている。最上段の踏桟部材６ｃの左右端部が上連結壁７６ｃと前後取付壁７６ｂとの間に内嵌されてリベット等の固定具２２で前後取付壁７６ｂに固定されている。 As shown in FIGS. 2, 3, 6, and 11, the upper guide member 76 includes a pair of front and rear side walls 76a and a pair of front and rear mounting walls 76b extending inward on the left and right above the front and rear side walls 76a. It has a horizontal plate-shaped upper connecting wall 76c connected to the upper part of the front-rear mounting wall 76b and a vertical plate-shaped lower connecting wall 76d connected to the lower part of the front-rear side wall 76a, and the front-rear side wall 76a is a rivet or the like. By striking the fixture 22, it is fixed to the front and rear side walls 13F and 13R of the column main body 8. The left and right ends of the uppermost tread member 6c are fitted inward between the upper connecting wall 76c and the front / rear mounting wall 76b, and are fixed to the front / rear mounting wall 76b with a fixture 22 such as a rivet.

図２，図３，図１０に示すように、下ガイド部材７７は、前後一対の側壁７７ａと、前後側壁７７ａの内側端部を連結した背壁７７ｂと、背壁７７ｂから内側方に突出した前後一対の収納側壁７７ｃと、収納側壁７７ｃの上部間を閉塞するように背壁７７ｂの上部から内側方に突出した上バネ受け壁７９とを有している。
前記前後側壁７７ａの左右方向の中途部に段部８０が設けられ、段部８０よりも内側方に係合片８１が前後方向内方に突設されており、前後側壁７７ａの外側部がリベット等の固定具２２を打ち付けることによって支柱本体８の前後側壁１３Ｆ，１３Ｒに固着され、段部８０と係合片８１との間で、操作部材６９の前後両端部を上下方向移動自在に挟持している。 As shown in FIGS. 2, 3 and 10, the lower guide member 77 protrudes inward from the pair of front and rear side walls 77a, the back wall 77b connecting the inner ends of the front and rear side walls 77a, and the back wall 77b. It has a pair of front and rear storage side walls 77c, and an upper spring receiving wall 79 projecting inward from the upper part of the back wall 77b so as to close between the upper parts of the storage side wall 77c.
A step portion 80 is provided in the middle of the front-rear side wall 77a in the left-right direction, an engaging piece 81 is projected inward in the front-rear direction inward of the step portion 80, and the outer portion of the front-rear side wall 77a is a rivet. By striking the fixture 22 such as, etc., it is fixed to the front and rear side walls 13F and 13R of the support column main body 8, and the front and rear ends of the operating member 69 are movably sandwiched between the step portion 80 and the engaging piece 81. ing.

図２，図３，図４，図５，図１０に示すように、前記連動具２７と操作部材６９の一端部との間に連結体８２が設けられている。連結体８２は、左右に前壁８２ａと背壁８２ｂとを有し、背壁８２ｂは前壁８２ａよりも上方に突出しており、背壁８２ｂの上部から内側方に上壁８２ｃが突設され、上壁８２ｃの外側部に上方及び外側方に階段状に屈曲した上係合片８３が突設されている。背壁８２ｂの下部と前壁８２ａの下部とを連結する底壁８２ｄが設けられ、背壁８２ｂと底壁８２ｄとの間に円筒状の連結筒８５が設けられ、前壁８２ａの上部と背壁８２ｂの中間部とを連結する下バネ受け壁８６が設けられ、前壁８２ａと背壁８２ｂと底壁８２ｄと下バネ受け壁８６との前後中央部を連結する連結壁８２ｅが設けられ、前壁８２ａの上部から外側方に下係合片８４が鈎形に突設されている。 As shown in FIGS. 2, 3, 4, 5, and 10, a connecting body 82 is provided between the interlocking tool 27 and one end of the operating member 69. The connecting body 82 has a front wall 82a and a back wall 82b on the left and right, the back wall 82b projects upward from the front wall 82a, and the upper wall 82c projects inward from the upper part of the back wall 82b. On the outer side of the upper wall 82c, an upper engaging piece 83 bent in a stepwise manner upward and outward is provided. A bottom wall 82d that connects the lower part of the back wall 82b and the lower part of the front wall 82a is provided, a cylindrical connecting cylinder 85 is provided between the back wall 82b and the bottom wall 82d, and the upper part and the back of the front wall 82a are provided. A lower spring receiving wall 86 for connecting the intermediate portion of the wall 82b is provided, and a connecting wall 82e for connecting the front wall 82a, the back wall 82b, the bottom wall 82d, and the lower spring receiving wall 86 is provided. A lower engaging piece 84 is projected outward from the upper part of the front wall 82a in a hook shape.

上係合片８３を操作部材６９の上係止孔７１に係脱自在に係合すると共に、下係合片８４を下係止孔７２に係脱自在に係合することにより、連結体８２は操作部材６９の下部に下方突出状でかつ着脱自在に連結固着されている。
連結体８２は底壁８２ｄを介して連動具２７の上壁２７ｂに載置され、ボルトナット等の締付具８８を前後の連結片６２と連結筒８５とに挿通して締め付けることにより、連結体８２は連動具２７に着脱自在に連結されている。 By engaging the upper engaging piece 83 with the upper locking hole 71 of the operating member 69 in a disengageable manner and engaging the lower engaging piece 84 with the lower locking hole 72 in a disengaged manner, the connecting body 82 Is detachably connected and fixed to the lower part of the operating member 69 in a downward protruding shape.
The connecting body 82 is placed on the upper wall 27b of the interlocking tool 27 via the bottom wall 82d, and is connected by inserting and tightening a tightening tool 88 such as a bolt nut through the front and rear connecting pieces 62 and the connecting cylinder 85. The body 82 is detachably connected to the interlocking tool 27.

而して、連結体８２の背壁８２ｂの上半分と下バネ受け壁８６と下ガイド部材７７の前後収納側壁７７ｃと上バネ受け壁７９とによって、バネ収納ケース８９が形成されている。
このバネ収納ケース８９内にコイルバネ９０を上下方向に収納し、コイルバネ９０の上端を上バネ受け壁７９で受け、コイルバネ９０の下端を下バネ受け壁８６で受けて、コイ
ルバネ９０によって下ガイド部材７７に対して連結体８２乃至連動具２７を下方に付勢している。従って、コイルバネ９０により構成した付勢部材９１によって連動具２７をロック位置Ｘに付勢するようになっている。 Thus, the spring storage case 89 is formed by the upper half of the back wall 82b of the connecting body 82, the lower spring receiving wall 86, the front and rear storage side walls 77c of the lower guide member 77, and the upper spring receiving wall 79.
The coil spring 90 is stored in the spring storage case 89 in the vertical direction, the upper end of the coil spring 90 is received by the upper spring receiving wall 79, the lower end of the coil spring 90 is received by the lower spring receiving wall 86, and the lower guide member 77 is received by the coil spring 90. The connecting body 82 to the interlocking tool 27 are urged downward. Therefore, the interlocking tool 27 is urged to the lock position X by the urging member 91 formed by the coil spring 90.

また、上係合片８３及び下係合片８４を上係止孔７１又は下係止孔７２から外して連結体８２を操作部材６９から取り外し、締付具８８を外して連結体８２を連動具２７から取り外すことにより、連結体８２を操作部材６９と連動具２７との間から退避させて開口溝１０を開放することができるようになっている。
また、連結体８２を操作部材６９から取り外し、締付具８８を緩めて、連結体８２を締付具８８廻りに内側方に回動することによっても、連結体８２を操作部材６９と連動具２７との間から退避させて開口溝１０を開放できるようになっている。 Further, the upper engaging piece 83 and the lower engaging piece 84 are removed from the upper locking hole 71 or the lower locking hole 72 to remove the connecting body 82 from the operating member 69, and the fastener 88 is removed to interlock the connecting body 82. By removing it from the tool 27, the connecting body 82 can be retracted from between the operating member 69 and the interlocking tool 27 to open the opening groove 10.
Further, by removing the connecting body 82 from the operating member 69, loosening the fastener 88, and rotating the connecting body 82 inward around the tightening tool 88, the connecting body 82 can be linked with the operating member 69. The opening groove 10 can be opened by retracting from the space 27.

その結果、開口溝１０より工具を挿入して、脚柱９の上部に取り付けた抜け止め部材１５を取り外すことができ、これにより、破損した脚柱９を支柱本体８から取り出して交換したり修理したりすることができる。
図２、図３、図６及び図１１に示すように、一対の操作部材６９間に、一対の操作部材６９を同時に手動操作する操作手段９３が設けられている。この操作手段９３は各操作部材６９に設けられた係合部９４と、左右操作部材６９の係合部９４と係合する連動部９５を有する操作杆９６とを有している。 As a result, a tool can be inserted through the opening groove 10 to remove the retaining member 15 attached to the upper part of the pedestal 9, whereby the damaged pedestal 9 can be taken out from the column body 8 and replaced or repaired. Can be done.
As shown in FIGS. 2, 3, 6 and 11, an operating means 93 for manually operating the pair of operating members 69 at the same time is provided between the pair of operating members 69. The operating means 93 has an engaging portion 94 provided on each operating member 69, and an operating rod 96 having an interlocking portion 95 that engages with the engaging portion 94 of the left and right operating members 69.

係合部９４は、操作部材６９とは別体に構成した係合体９８に形成したもので、係合体９８は、Ｌ字状に屈曲した取付部１０１と、取付部１０１から左右方向内方に突出した係合部９４とを一体に備え、取付部１０１は、垂直壁１０３と垂直壁１０３の上端部から左右方向外方に突出した水平壁１０４とを有し、係合部９４は水平壁１０４から左右方向の内方に突設されており、前後一対の係合片１０７と前後係合片１０７の下部同士を連結する水平板状の連結壁１０８とを有し、係合片１０７はその上面が左右方向内方に向けて下降傾斜しており、上下幅が左右方向の内方向けて徐々に細くなる先細状に形成されている。 The engaging portion 94 is formed in an engaging body 98 that is formed separately from the operating member 69, and the engaging portion 98 is formed in an L-shaped bent mounting portion 101 and inward in the left-right direction from the mounting portion 101. The mounting portion 101 integrally includes a protruding engaging portion 94, and the mounting portion 101 has a vertical wall 103 and a horizontal wall 104 projecting outward in the left-right direction from the upper end portion of the vertical wall 103, and the engaging portion 94 is a horizontal wall. It is projected inward in the left-right direction from 104, and has a pair of front-rear engaging pieces 107 and a horizontal plate-shaped connecting wall 108 that connects the lower parts of the front-rear engaging pieces 107. Its upper surface is inclined downward inward in the left-right direction, and is formed in a tapered shape in which the vertical width gradually narrows inward in the left-right direction.

取付部１０１はその垂直壁１０３が操作部材６９の左右方向の内面に沿って配置されると共に、水平壁１０４は操作部材６９の上端に上側から係合されて、リベット等の固定具２２で操作部材６９の上部に固定されている。
前記操作杆９６は左右方向に長い角筒状に形成され、最上段の踏桟部材６ｃの凹溝１９内に踏桟部材６ｃの長手方向に沿って左右方向に配置されており、これにより踏桟部材６ｃの下側から手動操作可能になっている。操作杆９６の左右両端部が連動部９５とされ、連動部９５がそれぞれ操作部材６９の係合部９４に外嵌され、これにより、操作杆９６が左右操作部材６９に連結されており、左右の連動部９５が左右の操作部材６９の係合部９４にそれぞれ係合され、操作杆９６の上方移動（ロック解除方向への移動）によって、左右の操作部材６９を同時に上方に引っ張って左右のロック機構７をロック解除できるようになっている。 The vertical wall 103 of the mounting portion 101 is arranged along the inner surface of the operating member 69 in the left-right direction, and the horizontal wall 104 is engaged with the upper end of the operating member 69 from above and operated by a fixture 22 such as a rivet. It is fixed to the upper part of the member 69.
The operating rod 96 is formed in a rectangular cylinder shape that is long in the left-right direction, and is arranged in the concave groove 19 of the uppermost stepping member 6c in the left-right direction along the longitudinal direction of the treading member 6c. It can be manually operated from the lower side of the crosspiece member 6c. The left and right ends of the operating rod 96 are interlocking portions 95, and the interlocking portions 95 are fitted onto the engaging portions 94 of the operating member 69, respectively, whereby the operating rod 96 is connected to the left and right operating members 69, and the left and right ends are connected to each other. The interlocking portion 95 is engaged with the engaging portions 94 of the left and right operating members 69, respectively, and the left and right operating members 69 are simultaneously pulled upward by the upward movement (movement in the unlocking direction) of the operating rod 96 to the left and right. The lock mechanism 7 can be unlocked.

操作杆９６の左右両側の連動部９５とこの連動部９５に対応する係合部９４との間の上下に遊びａ１，ａ２が設けられており、操作杆９６の一方の連動部９５を係合部９４に係合してロック解除方向（上方向）に移動したときに、操作杆９６の他方の連動部９５を係合部９４と非係合にする。従って、操作杆９６の左右両端部（左右連動部９５）の一方を上方に押動することにより、遊びａ１，ａ２によって、操作杆９６が左又は右上がりに傾斜し、一方の操作部材６９を上方移動させて左右のロック機構７の一方のみをロック解除できるようになっている。 Plays a1 and a2 are provided above and below between the interlocking portions 95 on both the left and right sides of the operating rod 96 and the engaging portions 94 corresponding to the interlocking portions 95, and one interlocking portion 95 of the operating rod 96 is engaged. When engaged with the portion 94 and moved in the unlocking direction (upward direction), the other interlocking portion 95 of the operation stick 96 is disengaged from the engaging portion 94. Therefore, by pushing one of the left and right end portions (left-right interlocking portion 95) of the operation stick 96 upward, the operation stick 96 is tilted to the left or upward by the play a1 and a2, and one of the operation members 69 is tilted. Only one of the left and right lock mechanisms 7 can be unlocked by moving it upward.

前記実施形態によれば、図４に示すように、ロック部材２３が脚柱９の被係止部１１に係合し、左右の脚柱９が支柱本体８に対して移動不能にロックされた状態で、左右の支柱５を同時に伸縮調整する場合、下側から最上段の踏桟部材６ｃの凹溝１９内に指を挿入して、操作杆９６の左右方向の中央部を上方に押圧すると、左右の操作部材６９がロック解除方向（上方）に引っ張られ、左右の連動具２７が付勢部材９１の付勢に抗してロック位置Ｘからロック解除位置Ｙに移動する。又は、ハンドルカバー４７のつまみ４８を摘んで、左右のハンドル２５を枢支軸２４廻りに矢印ａ方向の左右内方に揺動操作すると、左右
の作動部４２がカム面６１ａを上方に押して連動具２７が付勢部材９１の付勢に抗してロック位置Ｘからロック解除位置Ｙに移動する。 According to the embodiment, as shown in FIG. 4, the lock member 23 is engaged with the locked portion 11 of the pedestal 9, and the left and right pedestals 9 are immovably locked with respect to the column main body 8. In this state, when the left and right columns 5 are expanded and contracted at the same time, a finger is inserted into the concave groove 19 of the uppermost tread member 6c from the lower side, and the central portion of the operation rod 96 in the left-right direction is pressed upward. , The left and right operating members 69 are pulled in the unlocking direction (upward), and the left and right interlocking tools 27 move from the locking position X to the unlocking position Y against the urging of the urging member 91. Alternatively, when the knob 48 of the handle cover 47 is picked up and the left and right handles 25 are swung inward to the left and right in the direction of the arrow a around the pivot shaft 24, the left and right operating portions 42 push the cam surface 61a upward and interlock. The tool 27 moves from the lock position X to the unlock position Y against the urging of the urging member 91.

そして、左右のロック機構７では、連動具２７がロック位置Ｘからロック解除位置Ｙに移動するときに、第２押動片５９と操作片５５との間にアイドル間隙６５があるため、まず、連動具２７の上方移動によって規制部６０が押圧部５４対向位置から外れ、離脱阻止手段３０によるロック部材２３の離脱阻止が解除されて、ロック部材２３の離脱揺動が可能になる。その後に、第２押動片５９が操作片５５を上方に押動し、ロック部材２３の離脱揺動が開始され、ロック部材２３が離脱方向に揺動する。連動具２７がロック解除位置Ｙに移動したとき、ロック部材２３の脚柱９の被係止部１１からの離脱が完了する。その結果、左右の脚柱９が支柱本体８に対して移動可能になり、支柱５を伸縮することができる。 Then, in the left and right lock mechanisms 7, when the interlocking tool 27 moves from the lock position X to the lock release position Y, there is an idle gap 65 between the second push piece 59 and the operation piece 55. The upward movement of the interlocking tool 27 disengages the regulating portion 60 from the position facing the pressing portion 54, releases the locking member 23 from being prevented from being released by the release preventing means 30, and enables the lock member 23 to swing. After that, the second pushing piece 59 pushes the operation piece 55 upward, the release swing of the lock member 23 is started, and the lock member 23 swings in the release direction. When the interlocking tool 27 moves to the unlocked position Y, the release of the pedestal 9 of the lock member 23 from the locked portion 11 is completed. As a result, the left and right pedestals 9 can be moved with respect to the column main body 8, and the columns 5 can be expanded and contracted.

支柱５を伸縮させた後、左右の脚柱９を支柱本体８に対して移動不能にロックするには、操作杆９６の上方への押圧を解除し、又は、左右のハンドル２５の揺動操作を解除すると、付勢部材９１の付勢によって、操作部材６９乃至連動具２７が下方に移動し、左右の連動具２７がロック解除位置Ｙからロック位置Ｘに移動する。
連動具２７がロック解除位置Ｙからロック位置Ｘに移動するとき、まず、規制部６０が押圧部５４を下方に押動して、ロック部材２３を係合方向に揺動させる。その後、第１押動片５８が操作片５５を下方に押動するようになり、連動具２７がロック位置Ｘに移動したときに、ロック部材２３の係合方向への揺動が完了する。 In order to lock the left and right pedestals 9 immovably with respect to the support main body 8 after expanding and contracting the support column 5, the upward pressure of the operation stick 96 is released, or the left and right handle 25s are swung. When is released, the operating member 69 to the interlocking tool 27 moves downward due to the urging of the urging member 91, and the left and right interlocking tools 27 move from the unlocked position Y to the locked position X.
When the interlocking tool 27 moves from the unlocking position Y to the locking position X, the regulating unit 60 first pushes the pressing unit 54 downward to swing the locking member 23 in the engaging direction. After that, the first pushing piece 58 pushes the operating piece 55 downward, and when the interlocking tool 27 moves to the lock position X, the swing of the lock member 23 in the engaging direction is completed.

また、左右の連動具２７がロック位置Ｘに移動したときに、押圧部５４と規制部６０とが対向し、離脱阻止手段３０がロック部材２３の離脱方向への揺動を阻止する。その結果、ロック部材２３が脚柱９の被係止部１１に係合し、これにより脚柱９が支柱本体８に対して移動不能にロックされる。しかも、離脱阻止手段３０がロック部材２３の離脱方向への揺動を阻止し、脚柱９が支柱本体８に対して不測に伸縮移動するのを確実に防ぐことができる。 Further, when the left and right interlocking tools 27 move to the lock position X, the pressing portion 54 and the regulating portion 60 face each other, and the release preventing means 30 prevents the lock member 23 from swinging in the release direction. As a result, the lock member 23 engages with the locked portion 11 of the pedestal 9, whereby the pedestal 9 is immovably locked with respect to the column main body 8. Moreover, the detachment preventing means 30 can prevent the lock member 23 from swinging in the detaching direction, and can surely prevent the pedestal 9 from unexpectedly expanding and contracting with respect to the support column main body 8.

従って、左右の連動具２７がロック位置Ｘに移動したときに連動手段２９によりロック部材２３を脚柱９と係合させ、このとき同時に離脱阻止手段３０によってロック部材２３の脚柱９への係合が不測に外れるのを防止することができる。しかも、連動具２７がロック位置Ｘから外れると、離脱阻止手段３０がロック部材２３の離脱揺動を許容し、連動具２７のロック位置Ｘ乃至ロック解除位置Ｙへの移動によって、ロック部材２３の脚柱９への係合と脚柱９からの離脱とを簡単に変更操作することができ、伸縮調整の操作を簡単になし得る。 Therefore, when the left and right interlocking tools 27 move to the lock position X, the interlocking means 29 engages the lock member 23 with the pedestal 9, and at the same time, the disengagement preventing means 30 engages the lock member 23 with the pedestal 9. It is possible to prevent the case from coming off unexpectedly. Moreover, when the interlocking tool 27 is disengaged from the lock position X, the disengagement preventing means 30 allows the locking member 23 to disengage and swing, and the interlocking tool 27 moves from the lock position X to the lock release position Y to cause the lock member 23 to move. The engagement with the pedestal 9 and the disengagement from the pedestal 9 can be easily changed, and the expansion / contraction adjustment operation can be easily performed.

また、支柱５をその左右支柱本体８の一方のみを伸縮調整する場合、下側から最上段の踏桟部材６ｃの凹溝１９内に指を挿入して、操作杆９６の左右方向の一端部を上方に押圧すると、操作杆９６の左右方向の一端部のみが上方移動し、左右の操作部材６９の一方のみがロック解除方向（上方）に引っ張られ、一方の連動具２７が付勢部材９１の付勢に抗してロック位置Ｘからロック解除位置Ｙに移動する。又は、ハンドルカバー４７のつまみ４８を摘んで、左右のハンドル２５のうちの一方を枢支軸２４廻りに矢印ａ方向の左右内方に揺動操作すると、一方の作動部４２がカム面６１ａを上方に押して連動具２７が付勢部材９１の付勢に抗してロック位置Ｘからロック解除位置Ｙに移動する。その結果、一方のロック機構７のみがロック解除され、一方の支柱５のみが伸縮可能になり、一方の支柱５のみを簡単に伸縮調整することができる。 Further, when adjusting the expansion and contraction of only one of the left and right support main bodies 8 of the support column 5, a finger is inserted into the concave groove 19 of the uppermost tread member 6c from the lower side, and one end portion of the operation rod 96 in the left-right direction. Is pressed upward, only one end of the operating rod 96 in the left-right direction moves upward, only one of the left and right operating members 69 is pulled in the unlocking direction (upward), and one interlocking tool 27 moves the urging member 91. It moves from the lock position X to the unlock position Y against the urge to move. Alternatively, when the knob 48 of the handle cover 47 is picked up and one of the left and right handles 25 is swung inward to the left and right in the direction of the arrow a around the pivot shaft 24, one of the operating portions 42 moves the cam surface 61a. When pushed upward, the interlocking tool 27 moves from the lock position X to the unlock position Y against the urging of the urging member 91. As a result, only one of the lock mechanisms 7 is unlocked, only one of the columns 5 can be expanded and contracted, and only one of the columns 5 can be easily expanded and contracted.

従って、操作杆９６によるロック解除操作では、作業者が立った姿勢で解除操作することができ、操作杆９６の中央部をロック解除方向に操作すると、操作杆９６全体がロック解除方向に移動して、一対の操作部材６９が同時にロック解除方向に移動し、一対のロック機構７のロックが解除され、一対の支柱５が同時に伸縮可能になり、一対の支柱５を同時に簡単に伸縮調整することができる。 Therefore, in the unlocking operation by the operating stick 96, the operator can perform the unlocking operation in a standing posture, and when the central portion of the operating rod 96 is operated in the unlocking direction, the entire operating rod 96 moves in the unlocking direction. The pair of operating members 69 move in the unlocking direction at the same time, the pair of lock mechanisms 7 are unlocked, the pair of columns 5 can be expanded and contracted at the same time, and the pair of columns 5 can be easily expanded and contracted at the same time. Can be done.

また、両側の連動部９５と係合部９４との間に遊びａ１，ａ２が設けられているので、操作杆９６の一端部をロック解除方向に操作すると、操作杆９６の一端部がロック解除方向に移動して、操作杆９６の他端部が遊びａ１，ａ２でフリーになり非係合状態を保持し
て遊びａ１，ａ２の範囲内で移動し、操作杆９６が左又は右上がりに傾斜して、一方の操作部材６９のみがロック解除方向に移動し、他方の操作部材６９はロック解除方向に移動することはなくなり、一方のロック機構７のロックが解除され、他方のロック機構７のロックが維持されたままになる。 Further, since the play a1 and a2 are provided between the interlocking portion 95 and the engaging portion 94 on both sides, when one end of the operating rod 96 is operated in the unlocking direction, one end of the operating rod 96 is unlocked. Moving in the direction, the other end of the operating rod 96 becomes free with play a1 and a2, keeps the disengaged state, and moves within the range of play a1 and a2, and the operating rod 96 moves to the left or to the right. When tilted, only one operating member 69 moves in the unlocking direction, the other operating member 69 does not move in the unlocking direction, one locking mechanism 7 is unlocked, and the other locking mechanism 7 is unlocked. Lock remains in place.

このため、一方の支柱５のみが伸縮可能になり、一方の支柱５のみを簡単に伸縮調整することもできる。従って、例えば脚立１の接地場所に傾斜や凹凸がある場合に、一対の支柱５を互いに異なる長さに簡単に伸縮調整することが可能になり、脚立１を傾斜や凹凸がある場所にも安定かつ迅速に設置できるようになる。
また、操作部材６９が支柱本体８の外面に沿って配置されるため、ロック機構７や操作部材６９が脚立１の使用の邪魔になることもなくなる。しかも、ロック機構７や操作部材６９が脚柱９の外部に配置されるため、脚柱９を筒体で構成することができて強度的に有利になる。また、操作部材６９を使用して、ロック機構７から離れた箇所からロック部材２３の脚柱９への係合と脚柱９から離脱を簡単に操作することが可能になる。 Therefore, only one of the columns 5 can be expanded and contracted, and only one of the columns 5 can be easily expanded and contracted. Therefore, for example, when the ground contact location of the stepladder 1 is inclined or uneven, the pair of columns 5 can be easily expanded and contracted to different lengths, and the stepladder 1 is stable even in the inclined or uneven place. And it will be possible to install it quickly.
Further, since the operation member 69 is arranged along the outer surface of the support column main body 8, the lock mechanism 7 and the operation member 69 do not interfere with the use of the stepladder 1. Moreover, since the lock mechanism 7 and the operating member 69 are arranged outside the pedestal 9, the pedestal 9 can be formed of a tubular body, which is advantageous in terms of strength. Further, by using the operation member 69, it is possible to easily operate the engagement of the lock member 23 with the pedestal 9 and the disengagement from the pedestal 9 from a position away from the lock mechanism 7.

図１３及び図１４は本発明の伸縮装置を踏台１１１に実施した第２実施形態を示している。図１３及び図１４において、踏台１１１は、対向配置された一対の梯子２の上部を天板１１２の両端部にそれぞれ左右一対のブラケット１１５を介してピン１１６により枢支することにより主構成されている。この踏台１１１は一対の梯子２をピン１１６廻りに開いて接地面に接地して使用できると共に、一対の梯子２を折り畳んで開かないように両梯子２をロックして収納等ができるものである。 13 and 14 show a second embodiment in which the telescopic device of the present invention is mounted on the step 111. In FIGS. 13 and 14, the step 111 is mainly configured by pivotally supporting the upper portions of a pair of ladders 2 arranged to face each other on both ends of a top plate 112 with pins 116 via a pair of left and right brackets 115, respectively. There is. The step 111 can be used by opening a pair of ladders 2 around the pin 116 and grounding the ground surface, and can also lock and store both ladders 2 so as not to fold and open the pair of ladders 2. ..

梯子２は、第１実施形態の場合と同様に、伸縮自在な一対の支柱（伸縮体）５と、この左右支柱５をそれぞれ連結する複数の踏桟部材（桟部材）６と、支柱５と踏桟部材６との間に設けられたロック機構７を有している。また、一対の支柱（伸縮体）５は、間隔をおいて踏桟部材（桟部材）６で連結され、一対の支柱５の各支柱本体（外套体）８にはロック機構７と操作部材６９とが設けられ、一対の操作部材６９間に、一対の操作部材６９を同時に手動操作する操作手段９３が設けられ、操作手段９３は各操作部材６９に設けられた係合部９４と、連動部９５を有する操作杆９６とを有している。 As in the case of the first embodiment, the ladder 2 includes a pair of stretchable columns (expandable bodies) 5, a plurality of tread members (bar members) 6 connecting the left and right columns 5, and the columns 5. It has a lock mechanism 7 provided between the step ladder member 6. Further, the pair of columns (expandable body) 5 are connected by a tread member (bar member) 6 at intervals, and the lock mechanism 7 and the operation member 69 are attached to each column body (cloak body) 8 of the pair of columns 5. And, an operating means 93 for manually operating the pair of operating members 69 at the same time is provided between the pair of operating members 69, and the operating means 93 is provided with an engaging portion 94 provided on each operating member 69 and an interlocking portion. It has an operation stick 96 having 95.

そして、前記第１実施形態の場合とは異なり、係合部９４は、底壁１１９と上壁１２０と前後一対の側壁１２１と左右方向の外端部に位置する閉塞壁１２２とを有し、左右方向の内方側が開口した有底の角筒状に形成されている。
操作杆９６は左右方向に水平な板状に形成され、最上段の踏桟部材６ｃの凹溝１９内に踏桟部材６の長手方向に沿って左右方向に配置され、操作杆９６の左右両端部が連動部９５とされ、連動部９５がそれぞれ操作部材６９の係合部９４に遊嵌状に内嵌されている。これにより、操作杆９６は、踏桟部材６ｃの下側から手動操作可能であって、左右の連動部９５が左右の操作部材６９の係合部９４にそれぞれ係合され、操作杆９６の上方移動によって、左右の操作部材６９を同時に上方に引っ張って左右のロック機構７をロック解除できるようになっている。 Then, unlike the case of the first embodiment, the engaging portion 94 has a bottom wall 119, an upper wall 120, a pair of front and rear side walls 121, and a closing wall 122 located at an outer end portion in the left-right direction. It is formed in the shape of a bottomed square tube with an opening on the inner side in the left-right direction.
The operation stick 96 is formed in a horizontal plate shape in the left-right direction, and is arranged in the concave groove 19 of the uppermost tread member 6c in the left-right direction along the longitudinal direction of the tread member 6, and the left and right ends of the operation stick 96. The portions are referred to as interlocking portions 95, and the interlocking portions 95 are fitted in the engaging portions 94 of the operating members 69 in a loose-fitting manner. As a result, the operation stick 96 can be manually operated from the lower side of the tread member 6c, and the left and right interlocking portions 95 are engaged with the engaging portions 94 of the left and right operation members 69, respectively, and above the operation stick 96. By moving, the left and right operating members 69 can be pulled upward at the same time to unlock the left and right locking mechanisms 7.

操作杆９６の左右両側の連動部９５とこの連動部９５に対応する係合部９４との間に、遊びａ１，ａ２が設けられ、操作杆９６の一方の連動部９５を係合部９４に係合してロック解除方向（上方向）に移動したときに、操作杆９６の他方の連動部９５を係合部９４と非係合にするようになっている。
図１５は第３実施形態を示し、一対の操作部材６９を同時に手動操作する操作手段９３は、一対の操作部材６９を連結する操作杆９６と係合体９８とを有し、操作杆９６は断面Ｉ型の板状に形成され、操作杆９６の左右両端部が係合体９８を介して一対の操作部材６９にそれぞれ連結係合されている。 Plays a1 and a2 are provided between the interlocking portions 95 on both the left and right sides of the operation stick 96 and the engaging portion 94 corresponding to the interlocking portion 95, and one interlocking portion 95 of the operating rod 96 is attached to the engaging portion 94. When engaged and moved in the unlocking direction (upward direction), the other interlocking portion 95 of the operation stick 96 is disengaged from the engaging portion 94.
FIG. 15 shows a third embodiment. The operating means 93 for manually operating the pair of operating members 69 at the same time has an operating rod 96 connecting the pair of operating members 69 and an engaging body 98, and the operating rod 96 has a cross section. It is formed in the shape of an I-shaped plate, and the left and right ends of the operating stick 96 are connected and engaged with each other of the pair of operating members 69 via the engaging body 98.

係合体９８は、垂直壁１０３と水平壁１０４とを有するＬ字状に屈曲した取付部１０１と、取付部１０１から左右方向内方に突出した前後一対の連結片１３１とを一体に備え、取付部１０１は、前記実施形態の場合と同様に、リベット等の固定具２２で操作部材６９の上部に固定されている。
前後連結片１３１に取付孔１３２が設けられると共に、操作杆９６の左右両端部に前記取付孔１３２に対応する取付孔１３４が設けられており、操作杆９６の左右両端部が前後
連結片１３１間に内嵌されて、これらの取付孔１３２，１３４に挿通したボルトナット等の連結具１３６によって、操作杆９６の左右両端部が前後連結片１３１に締め付け固定されている。これにより、操作杆９６の上方移動（ロック解除方向への移動）によって、左右の操作部材６９を同時に上方に引っ張って左右のロック機構７をロック解除できるし、また、操作杆９６の左右両端部の取付孔１３４と連結具１３６との間の隙間や、連結片１３１の取付孔１３２と連結具１３６との間の隙間や、一対の操作部材６９の左右方向内方への撓み変形によって、操作杆９６の一端部をロック解除方向（上方向）に移動したときに、操作杆９６の他端部のロック解除方向（上方向）に移動を緩和吸収して抑制し、操作杆９６を左又は右上がりに傾斜させ、一方の操作部材６９のみを上方移動させて左右のロック機構７の一方のみをロック解除できるようになっている。従って、一対の操作部材６９と操作杆９６の左右両端部とは、操作杆９６の一端部をロック解除方向に操作したとき、操作杆９６を傾斜させて、一方の操作部材６９のみをロック解除方向に移動可能に係合されている。 The engaging body 98 integrally includes an L-shaped bent mounting portion 101 having a vertical wall 103 and a horizontal wall 104, and a pair of front and rear connecting pieces 131 protruding inward in the left-right direction from the mounting portion 101, and is mounted. The portion 101 is fixed to the upper part of the operating member 69 by a fixing tool 22 such as a rivet, as in the case of the above embodiment.
The front and rear connecting pieces 131 are provided with mounting holes 132, and the left and right ends of the operating rod 96 are provided with mounting holes 134 corresponding to the mounting holes 132, and the left and right ends of the operating rod 96 are between the front and rear connecting pieces 131. The left and right ends of the operation stick 96 are fastened and fixed to the front-rear connecting piece 131 by a connecting tool 136 such as a bolt and a nut that is internally fitted into the mounting holes 132 and 134 and inserted into the mounting holes 132 and 134. As a result, by moving the operating rod 96 upward (moving in the unlocking direction), the left and right operating members 69 can be pulled upward at the same time to unlock the left and right locking mechanisms 7, and the left and right ends of the operating rod 96 can be released. The operation is performed by the gap between the mounting hole 134 and the connecting tool 136, the gap between the mounting hole 132 of the connecting piece 131 and the connecting tool 136, and the bending deformation of the pair of operating members 69 inward in the left-right direction. When one end of the rod 96 is moved in the unlocking direction (upward), the movement is relaxed and absorbed in the unlocking direction (upward) of the other end of the operating rod 96 to suppress the movement, and the operating rod 96 is moved to the left or It is tilted upward to the right and only one of the operating members 69 is moved upward so that only one of the left and right lock mechanisms 7 can be unlocked. Therefore, when the pair of operating members 69 and the left and right ends of the operating rod 96 are operated in the unlocking direction, the operating rod 96 is tilted to unlock only one of the operating members 69. Engaged movably in the direction.

なお、図示省略しているが、前記実施形態の場合と同様に、操作杆９６は、前記実施形態の場合と同様に最上段の踏桟部材６ｃの凹溝１９内に踏桟部材６ｃの長手方向に沿って左右方向に配置されており、これにより、踏桟部材６ｃの下側から手動操作可能になっている。
なお、本実施形態にかかる発明は、上記実施の形態に限定されるものではない。上記の実施の形態では、伸縮装置を伸縮可能な支柱５を有する脚立１や踏台１１１に適用したが、これに代え、伸縮装置を梯子その他に適用しても良い。 Although not shown, in the same manner as in the case of the above-described embodiment, the operation stick 96 has the longitudinal length of the tread member 6c in the concave groove 19 of the uppermost tread member 6c as in the case of the above-described embodiment. It is arranged in the left-right direction along the direction, so that it can be manually operated from the lower side of the tread member 6c.
The invention according to the present embodiment is not limited to the above embodiment. In the above embodiment, the telescopic device is applied to the stepladder 1 or the step 111 having the telescopic support 5, but instead, the telescopic device may be applied to the ladder or the like.

また、伸縮体は支柱本体８と脚柱９とで構成される支柱５に限定されず、伸縮体は筒状の部材内に脚柱９が挿入されて全体として伸縮する部材であればよい。
また、前記実施形態では、連動具２７がロック解除位置Ｙからロック位置Ｘに移動するとき、まず、規制部６０が押圧部５４を下方に押動して、ロック部材２３を係合方向に揺動させ、その後、第１押動片５８が操作片５５を下方に押動するようになっているが、これに代え、連動具２７がロック解除位置Ｙからロック位置Ｘに移動するとき、第１押動片５８が操作片５５を下方に押動することによってのみ、ロック部材２３が係合方向へ揺動するようにしてもよい。 Further, the telescopic body is not limited to the strut 5 composed of the strut body 8 and the pedestal 9, and the telescopic body may be a member that expands and contracts as a whole by inserting the pedestal 9 into the tubular member.
Further, in the above embodiment, when the interlocking tool 27 moves from the unlocking position Y to the locking position X, the regulating portion 60 first pushes the pressing portion 54 downward to swing the lock member 23 in the engaging direction. After that, the first pushing piece 58 pushes the operating piece 55 downward. Instead, when the interlocking tool 27 moves from the unlocking position Y to the locking position X, the first pushing piece 58 is moved downward. 1 The lock member 23 may swing in the engaging direction only when the pushing piece 58 pushes the operating piece 55 downward.

１脚立（伸縮装置）
２梯子
５支柱（伸縮体）
６踏桟部材（桟部材）
７ロック機構
８支柱本体（外套体）
９脚柱（挿入体）
１１被係止部
２３ロック部材
２４枢支軸
２５ハンドル
６９操作部材
９４係合部
９５連動部
９６操作杆
９８係合体
ａ１遊び
ａ２遊び
１１１踏台（伸縮装置） 1 Stepladder (expansion and contraction device)
2 Ladder 5 Support (expandable body)
6 Tread member (bar member)
7 Lock mechanism 8 Support body (cloak body)
9 pedestal (insertion body)
11 Locked part 23 Lock member 24 Axis support shaft 25 Handle 69 Operation member 94 Engagement part 95 Interlocking part 96 Operation stick 98 Engagement body a1 Play a2 Play 111 Step (extension device)

Claims

A pair of left and right telescopic bodies (5) having a mantle (8) and an insert body (9) that is stretchably inserted into the mantle (8) and whose lower end can be grounded, and the left and right stretchable bodies (5). ), The upper, middle, and lower three-stage tread members (6), which are connected to the facing surfaces of the outer body (8) in the longitudinal direction so as to face each other, and the insertion inserted into each outer body (8). Expansion and contraction including a lock mechanism (7) for fixing the body (9) to the mantle body (8) at an expanded and contracted position, and an operating member (69) for locking and unlocking each lock mechanism (7). It ’s a device,
The operating member (69) is arranged so as to be linearly movable up and down along the facing surface of the mantle body (8), and extends to the vicinity of the connecting position between the mantle body (8) and the upper tread member (6). , An upper end portion to which a force for moving the operating member (69) up and down is applied is formed on the upper part of the operating member (69).
An operation stick (96) that applies a force for vertically moving the upper end of the operation member (69) at a position below the upper surface of the upper step member (6) and along the upper step member (6). Have been placed and
An interlocking portion (95) is provided at the end of the operating rod (96), and is engaged with the interlocking portion (95) to convert the operation of the operating rod (96) into the vertical movement of the operating member (69). A telescopic device characterized in that a joint portion (94) is provided at an upper end portion of an operating member (69).

The upper tread member (6) has a concave groove (19) opened downward below the upper surface, and the operation stick (96) is operably arranged in the concave groove (19). The telescopic device according to claim 1, wherein the telescopic device is provided.

The telescopic device according to claim 1 or 2, wherein the engaging portion (94) is formed of an engaging body (98) that is formed and fixed separately from the operating member (69). ..

The mantle body (8) has a substantially U-shape in cross-sectional view, and an opening groove (10) is formed in the longitudinal direction on the facing portion side where the mantle body (8) faces.
The telescopic device according to any one of claims 1 to 3, wherein the operating member (69) is arranged so as to close the opening groove (10) on the facing surface side of the mantle body (8).

A connection in which the lock member (23) is engaged and disengaged by moving the operating member (69) up and down between the lower portion of the operating member (69) and the lock member (23) and at a position facing the opening groove (10). The telescopic device according to claim 4, wherein the body (82) is provided.

The operating member (69) includes a plate-shaped operating wall portion (69a) that is long in the vertical direction so as to close the opening groove (10), and a pair of front and rear operating members (69a) that project outward from both front and rear ends of the operating wall portion (69a). The telescopic device according to claim 4 or 5, further comprising a side wall portion (69b).

Each of the lock mechanisms (7) is provided in the insertion body (9) along the longitudinal direction and faces the opening groove (10), the locked portion (11), the outer body (8), and the lower tread member. A lock member (23) that is arranged in the vicinity of the connection position with (6) and is inserted into and detached from the opening groove (10) to engage with the locked portion (11) of the insert body (9) in a disengaged manner. A pivot shaft (24) that swingably supports the lock member (23), a spring (90) that urges the lock member (23) in a locking operation direction, and a lock against the spring (90). A handle (25) that swings the member (23) around the pivot shaft (24), and a support frame (18) that is fixed to the facing surface of the mantle (8) and supports the pivot shaft (24). The telescopic device according to any one of claims 4 to 6, wherein the telescopic device is characterized by having.

At the upper end of the insert body (9), a retaining member (15) that comes into contact with the lock mechanism (7) and regulates the removal from the mantle body (8) protrudes outward from the opening groove (10). The telescopic device according to any one of claims 4 to 7, wherein the telescopic device is provided.